Question

What happened to the denominator? How were they combined?


\[=\frac{k\lambda dy}{x^2+y^2}\frac{x}{\sqrt{x^2+y^2}}\]
\[=k\lambda x \frac{dy}{\left(x^2+y^2\right)^{3/2}}\]

Answer 1

@dumbcow

Answer 2

oh the exponents are just added....durrrrrrrrr....sorry :S